28617651 has 16 divisors (see below), whose sum is σ = 42532000. Its totient is φ = 19017504.

The previous prime is 28617649. The next prime is 28617697. The reversal of 28617651 is 15671682.

It is not a de Polignac number, because 28617651 - 2¹ = 28617649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28617551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7905 + ... + 10941.

It is an arithmetic number, because the mean of its divisors is an integer number (2658250).

Almost surely, 2^28617651 is an apocalyptic number.

28617651 is a deficient number, since it is larger than the sum of its proper divisors (13914349).

28617651 is a wasteful number, since it uses less digits than its factorization.

28617651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395 (or 3389 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28617651 is about 5349.5468032348. The cubic root of 28617651 is about 305.8754779774.

The spelling of 28617651 in words is "twenty-eight million, six hundred seventeen thousand, six hundred fifty-one".